Method for district cooling of blast furnace during blast furnace dissection

Abstract

The invention provides a method for district cooling of a blast furnace during blast furnace dissection, belonging to the technical field of ironmaking. The method comprises the following steps: calibrating a district cooling datum line; drilling a cooling medium filling opening on the datum line; estimating the heat produced in unit time after the blast furnace blows out as well as cooling waterflow required in cooling the blast furnace; carrying out district cooling; and finishing district cooling. Compared with the background technology, the method combines a blast furnace smelting technology with the need of blast furnace dissection to formulate a special blast furnace cooling method during blast furnace dissection, thus the method can truly keep information in the blast furnace smelting process, and is favourable for knowing the furnace burden distribution state, the furnace burden granularity variation, the furnace burden reducing process, the slag and molten iron distribution state, chemical element distribution state and the like in the blast furnace smelting process.

Description

technical field [0001] The invention relates to a method for cooling a blast furnace in different regions when dissecting the blast furnace, and belongs to the technical field of ironmaking. Background technique [0002] Blast furnace pig iron smelting is an important link in the metallurgical industry. It involves high-temperature solid, liquid, and gas phases, and various complex chemical reactions and physical changes occur. However, it is difficult to observe and study the inside of the blast furnace during the actual smelting process, and it is also difficult to conduct laboratory research. Dissecting a blast furnace by shutting down and dismantling it is an effective method for studying blast furnaces. Domestic research on blast furnace anatomy is less, especially the research on large blast furnace anatomy is still in its infancy. Blast furnace anatomy research requires huge manpower, material and financial resources. For a specific blast furnace, its anatomical res...

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Problems solved by technology

Therefore, cooling the blast furnace by pumping water from the top of the furnace may mislead scientific researchers to carry out blast furnace anatomy and subsequent scientific research work

The second is to inject liquid nitrogen from the top of the blast furnace. This method has the advantage of rapid cooling, but it requires huge manpower and material resources, and there are certain safety hazards. The research on this at home and abroad is not perfect.

[0009] The above-mentioned patent application documents disclose the method of structural modification or water cooling of a certain part of the blast furnace under normal production conditions, but it does not mention the reasonable cooling of the blast furnace before the blast furnace is dissected.

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